%0 Journal Article %A S. A. Gordon %A M. A. Menkovskii %A N. N. Nurminskii %T On the chemical characteristic of organogermanium compounds in coals %J Doklady Akademii Nauk %D 1963 %P 840-841 %V 153 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1963_153_4_a21/ %G ru %F DAN_1963_153_4_a21